Arc-lamp.



C. A. B. IIALVURSOH, Il.

ABG Lm.

unicum! Hmm nl. 1s, 1901.

Patented Jan 26, 1909.

lI-IIIIIIIIII/ lll/ll lll/llll//l Invnto wson Jr.,

Cromw mty.

UNITED STATES MlA'IgEN-T OliilFlCE.

CROMWELL A. B. HALVORSON, JR., Ola-LYNN, MASSACHUSETTS, ASSlGXOH 'IO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

ARG-LAMP.

To all 'whom it may concern:

'Be it known that I, CROMWELL A.. B. HAL- VORSON, Jr., a citizen of the United States, residing at Lynn, county oi' Essex, State of Massachusetts, have invented certain new and useful Improvements in Arc-Lamps, of which the following is a specification.

My invention relates to electric arc lamps and has for its object to simplify and improve the construction of .the same.

T he various features of novelty which constitute my invention will be hereinafter particularly pointed out in the claims.

For a full understanding of my invention, however, and of its various objects and advantages reference may be had to the following detailed description taken in connection with the accompanying drawing, wherein` Figure 1 shows in side elevation a lamp arranged in accordance with the preferred form of my invention, the globe and casing being omitted for the sake of clearness; Fig. 2 is a longitudinal cross-section of the lamp shown in Fig. 1 ;'and Fig. 3 shows a detail.

The lamp shown in the drawings is of the type wherein one of the electrodes is consuming and the other non-consuming, but it will of course be vunderstood-that both of the Specification of Letters Patent.

Application filed January 16, 1997.

chimney is l This is conveniently accomplished by cutting 75 Patente-fi Jan. es, ieee.

serial No. 352,523.

consists of an electroinagnet comprising'the 65 members 11' and 12 which are supported from the chimney member 3 by means of brackets 13 and le. The cores and arma-- tures 15 and 16 of these electromagnets are connected respectively to clutchesl and 18,

which are adapted. to act upon the floating chimney. In order to permit the application of the clutch mechanism, the stationary cut away adjacent the platform.

away the whole lower end of the chimney and connecting it to the platform by means of relatively 'narrow brackets 19 and 2S,A which thus become parts' of the stationary chimney. When the lamp is not burning, the floating chimney drops down until the upper elec'- trode rests upon the lower electrode. When the current is turned on, the regulating mag-l The arc gases, it will be 5,0

5o a floating draft-tube or.' chimney member 8 3o electrodes may be such that Ithey consume during the burnin Aof the lamp. The lamp frame comprises alliood 1, a platform 2 and a central backbone member 3 which secures the hood and platform together and constitutes the main chimney of the lamp. At its upper end the chimney projects vthrough the y hoodand'at its lower end it registers. with 4 an net is energized and, acting through the clutches, lifts the chimney so as to strike the arc. As the lower electrode consumes and the arc grows longer, the regulating'ma .et

is weakened sothat the cores gradually rop and feed the chimney downward,.whereb,f a substantially normal arc is maintained.

lVhenv the chimney is fed. downward far opening 4 in the platform. enough to cause the clutches to rest upon c. .j

5 is a stationary .electrode supported be-Ilplatform, or when the arc breaks from any neath .the platform of the lamp, in axial .cause,the hold of the clutches upon the chimaline'ment witl'rthe chimney` or draft, tube, ney is released and the chimney is free to deby means of a holder of any usual or prescend until the electrodes are 'again brought ferred construction. -'The companion elecin engagement with each other. lf' current? trode which, in the'present. instance, is shown is then still being supplied to the lamp, the as being in the form of a bar 7, arranged chimney will be picked up again in the 100 transversely to the axi'sof the lower elecmanner described. Consequentl.y,the up er.

trode and having a central cylindrical porelectrode and its supporting-chimney are ed tion 7 `axially alned with the lower elecdownward step by step during the feeding trode,` is carried witldn. the lower end of operation of the lamp. The stem of the iloating chimney is of such length that the upper end thereof does not pass beyond the lower end of the stationary chimney during normal operation.

Y By myinvention, therefore, lamps may be formed in simple andv compact forni and of 119 which is arranged in telesco ed relation with lthe main chimney. This oating chimney preferably consistsof'a stem 9 havin a bellshaped portion 10 at its lower en- The bell-shaped portion, within. which the upper but lfew parts without yimpai'ring the- (affecteiveness of the'draft devices or the nicety of feeding. and regulation. l, "l What,- I'claim asnew and desire to secure by Letters Patent of the United States, is,

1. In an arclam ,-a'hood, a platform, a

central tubular bac -bone member connectng'the-hood and platform together and con- 1'stituting the main vchimney of the lamp, a

movable auxiliary chimney telescoped within the backbone member, an'electrode car-l;- -vried at the lower end of thelauxiliary chime ey-Y mjdclutch mechanism engaging the..

' auxiliary chimney ,for controlling the position |`of the latter`andof the-electrode `carried thereby.

2. n an' arc lamp,'a'l1( )'o`d^,a platform, a central tubular backbone member connecting the hood land* platform together and consti- -tuting the main chimney of the lamp, a movablev auxiliary chimney telescoped within the backbone member, anv electrode carried by vthe lower end of the auxiliary ohimne ,y and. means for engaging the outerfaee of t' e lat-l Y ter for controllingitsposition land that of the electrode. l i

A"3. In an arc lamp, a hood, a platform, a y,

stituting the nain chimney of the lam movable auxiliary chimney inl telescop'eclre.- lation vvith the main chimne an electrode carried at. the lower end ov the auxiliary chimney, a second electrode,v and clutch mechanism'engaging the outer face of'said maevacentral vtubularbackbone member' connecting the hood and platformtogether and 'conauxiliary chimney for changing the relative positions of the 'said electrodes.

l'4.1m an are lam a hood, a platform, a

`central tubularbac bone member connect` ing the hood and platform together and con-` stitut'ing the main chimney of the lamp, an

auxiliary chimney in telescoped relation with A the main' chimney, an electrode carried at the lower end` ofthe auxiliary chimney, an

lelectromagg'net mountedon said main chim-A fney, a clutchjdevice engaging said auxiliary chimney, and a connection between sa-1d 

